drivers/gpu/drm/sis/sis_mm.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  *
  27  **************************************************************************/
  28
  29 /*
  30  * Authors:
  31  *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  32  */
  33
  34 #include "drmP.h"
  35 #include "sis_drm.h"
  36 #include "sis_drv.h"
  37
  38 #include <video/sisfb.h>
  39
  40 #define VIDEO_TYPE 0
  41 #define AGP_TYPE 1
  42
  43
  44 struct sis_memblock {
  45         struct drm_mm_node mm_node;
  46         struct sis_memreq req;
  47         struct list_head owner_list;
  48 };
  49
  50 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
  51 /* fb management via fb device */
  52
  53 #define SIS_MM_ALIGN_SHIFT 0
  54 #define SIS_MM_ALIGN_MASK 0
  55
  56 #else /* CONFIG_FB_SIS[_MODULE] */
  57
  58 #define SIS_MM_ALIGN_SHIFT 4
  59 #define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
  60
  61 #endif /* CONFIG_FB_SIS[_MODULE] */
  62
  63 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  64 {
  65         drm_sis_private_t *dev_priv = dev->dev_private;
  66         drm_sis_fb_t *fb = data;
  67
  68         mutex_lock(&dev->struct_mutex);
  69         /* Unconditionally init the drm_mm, even though we don't use it when the
  70          * fb sis driver is available - make cleanup easier. */
  71         drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);
  72
  73         dev_priv->vram_initialized = 1;
  74         dev_priv->vram_offset = fb->offset;
  75
  76         mutex_unlock(&dev->struct_mutex);
  77         DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
  78
  79         return 0;
  80 }
  81
  82 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
  83                          void *data, int pool)
  84 {
  85         drm_sis_private_t *dev_priv = dev->dev_private;
  86         drm_sis_mem_t *mem = data;
  87         int retval = 0, user_key;
  88         struct sis_memblock *item;
  89         struct sis_file_private *file_priv = file->driver_priv;
  90         unsigned long offset;
  91
  92         mutex_lock(&dev->struct_mutex);
  93
  94         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
  95                       dev_priv->agp_initialized)) {
  96                 DRM_ERROR
  97                     ("Attempt to allocate from uninitialized memory manager.\n");
  98                 mutex_unlock(&dev->struct_mutex);
  99                 return -EINVAL;
 100         }
 101
 102         item = kzalloc(sizeof(*item), GFP_KERNEL);
 103         if (!item) {
 104                 retval = -ENOMEM;
 105                 goto fail_alloc;
 106         }
 107
 108         mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 109         if (pool == AGP_TYPE) {
 110                 retval = drm_mm_insert_node(&dev_priv->agp_mm,
 111                                             &item->mm_node,
 112                                             mem->size, 0);
 113                 offset = item->mm_node.start;
 114         } else {
 115 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 116                 item->req.size = mem->size;
 117                 sis_malloc(&item->req);
 118                 if (item->req.size == 0)
 119                         retval = -ENOMEM;
 120                 offset = item->req.offset;
 121 #else
 122                 retval = drm_mm_insert_node(&dev_priv->vram_mm,
 123                                             &item->mm_node,
 124                                             mem->size, 0);
 125                 offset = item->mm_node.start;
 126 #endif
 127         }
 128         if (retval)
 129                 goto fail_alloc;
 130
 131 again:
 132         if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) {
 133                 retval = -ENOMEM;
 134                 goto fail_idr;
 135         }
 136
 137         retval = idr_get_new_above(&dev_priv->object_idr, item, 1, &user_key);
 138         if (retval == -EAGAIN)
 139                 goto again;
 140         if (retval)
 141                 goto fail_idr;
 142
 143         list_add(&item->owner_list, &file_priv->obj_list);
 144         mutex_unlock(&dev->struct_mutex);
 145
 146         mem->offset = ((pool == 0) ?
 147                       dev_priv->vram_offset : dev_priv->agp_offset) +
 148             (offset << SIS_MM_ALIGN_SHIFT);
 149         mem->free = user_key;
 150         mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
 151
 152         return 0;
 153
 154 fail_idr:
 155         drm_mm_remove_node(&item->mm_node);
 156 fail_alloc:
 157         kfree(item);
 158         mutex_unlock(&dev->struct_mutex);
 159
 160         mem->offset = 0;
 161         mem->size = 0;
 162         mem->free = 0;
 163
 164         DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
 165                   mem->offset);
 166
 167         return retval;
 168 }
 169
 170 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 171 {
 172         drm_sis_private_t *dev_priv = dev->dev_private;
 173         drm_sis_mem_t *mem = data;
 174         struct sis_memblock *obj;
 175
 176         mutex_lock(&dev->struct_mutex);
 177         obj = idr_find(&dev_priv->object_idr, mem->free);
 178         if (obj == NULL) {
 179                 mutex_unlock(&dev->struct_mutex);
 180                 return -EINVAL;
 181         }
 182
 183         idr_remove(&dev_priv->object_idr, mem->free);
 184         list_del(&obj->owner_list);
 185         if (drm_mm_node_allocated(&obj->mm_node))
 186                 drm_mm_remove_node(&obj->mm_node);
 187 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 188         else
 189                 sis_free(obj->req.offset);
 190 #endif
 191         kfree(obj);
 192         mutex_unlock(&dev->struct_mutex);
 193         DRM_DEBUG("free = 0x%lx\n", mem->free);
 194
 195         return 0;
 196 }
 197
 198 static int sis_fb_alloc(struct drm_device *dev, void *data,
 199                         struct drm_file *file_priv)
 200 {
 201         return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
 202 }
 203
 204 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
 205                               struct drm_file *file_priv)
 206 {
 207         drm_sis_private_t *dev_priv = dev->dev_private;
 208         drm_sis_agp_t *agp = data;
 209         dev_priv = dev->dev_private;
 210
 211         mutex_lock(&dev->struct_mutex);
 212         drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
 213
 214         dev_priv->agp_initialized = 1;
 215         dev_priv->agp_offset = agp->offset;
 216         mutex_unlock(&dev->struct_mutex);
 217
 218         DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
 219         return 0;
 220 }
 221
 222 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
 223                                struct drm_file *file_priv)
 224 {
 225
 226         return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
 227 }
 228
 229 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
 230 {
 231         struct drm_map_list *entry;
 232         drm_local_map_t *map;
 233
 234         list_for_each_entry(entry, &dev->maplist, head) {
 235                 map = entry->map;
 236                 if (!map)
 237                         continue;
 238                 if (map->type == _DRM_REGISTERS)
 239                         return map;
 240         }
 241         return NULL;
 242 }
 243
 244 int sis_idle(struct drm_device *dev)
 245 {
 246         drm_sis_private_t *dev_priv = dev->dev_private;
 247         uint32_t idle_reg;
 248         unsigned long end;
 249         int i;
 250
 251         if (dev_priv->idle_fault)
 252                 return 0;
 253
 254         if (dev_priv->mmio == NULL) {
 255                 dev_priv->mmio = sis_reg_init(dev);
 256                 if (dev_priv->mmio == NULL) {
 257                         DRM_ERROR("Could not find register map.\n");
 258                         return 0;
 259                 }
 260         }
 261
 262         /*
 263          * Implement a device switch here if needed
 264          */
 265
 266         if (dev_priv->chipset != SIS_CHIP_315)
 267                 return 0;
 268
 269         /*
 270          * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 271          * because its polling frequency is too low.
 272          */
 273
 274         end = jiffies + (DRM_HZ * 3);
 275
 276         for (i = 0; i < 4; ++i) {
 277                 do {
 278                         idle_reg = SIS_READ(0x85cc);
 279                 } while (!time_after_eq(jiffies, end) &&
 280                           ((idle_reg & 0x80000000) != 0x80000000));
 281         }
 282
 283         if (time_after_eq(jiffies, end)) {
 284                 DRM_ERROR("Graphics engine idle timeout. "
 285                           "Disabling idle check\n");
 286                 dev_priv->idle_fault = 1;
 287         }
 288
 289         /*
 290          * The caller never sees an error code. It gets trapped
 291          * in libdrm.
 292          */
 293
 294         return 0;
 295 }
 296
 297
 298 void sis_lastclose(struct drm_device *dev)
 299 {
 300         drm_sis_private_t *dev_priv = dev->dev_private;
 301
 302         if (!dev_priv)
 303                 return;
 304
 305         mutex_lock(&dev->struct_mutex);
 306         if (dev_priv->vram_initialized) {
 307                 drm_mm_takedown(&dev_priv->vram_mm);
 308                 dev_priv->vram_initialized = 0;
 309         }
 310         if (dev_priv->agp_initialized) {
 311                 drm_mm_takedown(&dev_priv->agp_mm);
 312                 dev_priv->agp_initialized = 0;
 313         }
 314         dev_priv->mmio = NULL;
 315         mutex_unlock(&dev->struct_mutex);
 316 }
 317
 318 void sis_reclaim_buffers_locked(struct drm_device *dev,
 319                                 struct drm_file *file)
 320 {
 321         struct sis_file_private *file_priv = file->driver_priv;
 322         struct sis_memblock *entry, *next;
 323
 324         mutex_lock(&dev->struct_mutex);
 325         if (list_empty(&file_priv->obj_list)) {
 326                 mutex_unlock(&dev->struct_mutex);
 327                 return;
 328         }
 329
 330         if (dev->driver->dma_quiescent)
 331                 dev->driver->dma_quiescent(dev);
 332
 333
 334         list_for_each_entry_safe(entry, next, &file_priv->obj_list,
 335                                  owner_list) {
 336                 list_del(&entry->owner_list);
 337                 if (drm_mm_node_allocated(&entry->mm_node))
 338                         drm_mm_remove_node(&entry->mm_node);
 339 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 340                 else
 341                         sis_free(entry->req.offset);
 342 #endif
 343                 kfree(entry);
 344         }
 345         mutex_unlock(&dev->struct_mutex);
 346         return;
 347 }
 348
 349 struct drm_ioctl_desc sis_ioctls[] = {
 350         DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
 351         DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
 352         DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 353         DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
 354         DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
 355         DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 356 };
 357
 358 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);